{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [],
   "source": [
    "from sklearn import tree\n",
    "import csv\n",
    "import graphviz\n",
    "\n",
    "X = []\n",
    "Y = []\n",
    "feature_names=['色泽','根部','敲声','纹理','脐部','触感','密度','含糖率']\n",
    "classes_names=[\"好瓜\",\"坏瓜\"]\n",
    "with open(\"watermelon.csv\") as file:\n",
    "    reader = csv.reader(file)\n",
    "    for line in reader:\n",
    "        X.append(list(map(float, line[:-1])))\n",
    "        Y.append(int(line[-1]))\n",
    "\n",
    "clf = tree.DecisionTreeClassifier()\n",
    "clf.fit(X, Y)\n",
    "dot_data = tree.export_graphviz(clf, out_file=None,\n",
    "                               feature_names=feature_names,\n",
    "                               class_names=classes_names,\n",
    "                               filled=True,rounded=True,\n",
    "                               special_characters=True)\n",
    "graph = graphviz.Source(dot_data)\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
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\n",
      "text/plain": [
       "<Figure size 432x288 with 1 Axes>"
      ]
     },
     "metadata": {
      "needs_background": "light"
     },
     "output_type": "display_data"
    },
    {
     "data": {
      "image/png": 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      "text/plain": [
       "<Figure size 432x288 with 1 Axes>"
      ]
     },
     "metadata": {
      "needs_background": "light"
     },
     "output_type": "display_data"
    }
   ],
   "source": [
    "from sklearn import tree\n",
    "import matplotlib.pyplot as plt\n",
    "import numpy as np\n",
    "import graphviz\n",
    "X=np.random.rand(100)*np.pi\n",
    "noise=np.random.normal(size=100)/20\n",
    "Y=np.sin(X)+noise\n",
    "plt.plot(X,Y,'bo')\n",
    "plt.show()\n",
    "X=X.reshape(-1,1)\n",
    "clf = tree.DecisionTreeRegressor(max_depth=10)\n",
    "clf.fit(X, Y)\n",
    "dot_data = tree.export_graphviz(clf, out_file=None)\n",
    "graph = graphviz.Source(dot_data,)\n",
    "test_x=np.arange(0,np.pi,0.0001).reshape(-1,1)\n",
    "pred=clf.predict(test_x)\n",
    "plt.plot(test_x,pred,'ro',ms=2)\n",
    "plt.show()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 52,
   "metadata": {},
   "outputs": [
    {
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